title: Risk factors and perinatal outcomes associated with idiopathic small for gestational age Taiwanese newborns.
abstract: OBJECTIVE
  To determine risk factors and perinatal outcomes associated with small for gestational age (SGA) neonates among healthy pregnant women.
  
  
  METHODS
  A retrospective cohort study was conducted of 49 945 women who gave birth at Chang Gung Memorial Hospital, Taipei, Taiwan, after 24weeks of pregnancy. Idiopathic SGA newborns (n=3398) were characterized by a birth weight below the 10th percentile for mean weight corrected for GA and fetal sex.
  
  
  RESULTS
  Risk factors for idiopathic SGA newborns included hypercoiling of the umbilical cord (adjusted odds ratio [aOR], 3.3; 95% confidence interval [CI], 1.6-7.0); prior fetal death (aOR, 2.8; 95% CI, 2.0-3.9); primiparity (aOR, 1.5; 95% CI, 1.4-1.7); adolescent pregnancy (aOR, 1.5; 95% CI, 1.2-2.0), low prepregnancy weight (aOR, 1.6; 95% CI, 1.5-1.8), low prepregnancy body mass index (aOR, 1.1; 95% CI, 1.0-1.3); short stature (aOR, 1.3; 95% CI, 1.1-1.4); and entangled umbilical cord (aOR, 1.1; 95% CI, 1.0-1.3). Idiopathic SGA newborns correlated with increased risk of adverse perinatal outcomes, including fetal death, low Apgar scores, oligohydramnios, placental abruption, and admission to the neonatal intensive care unit.
  
  
  CONCLUSIONS
  Some risk factors for idiopathic SGA newborns were modifiable, suggesting potential implications for public health.
authors.affiliation: Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Taipei, Taipei, Taiwan. thh20@adm.cgmh.org.tw
authors.forename: Tai-Ho
authors.initials: TH
authors.lastname: Hung
authors.forename: T'sang-T'ang
authors.initials: TT
authors.lastname: Hsieh
authors.forename: Liang-Ming
authors.initials: LM
authors.lastname: Lo
authors.forename: Tsung-Hung
authors.initials: TH
authors.lastname: Chiu
authors.forename: Ching-Chang
authors.initials: CC
authors.lastname: Hsieh
authors.forename: Jenn-Jeih
authors.initials: JJ
authors.lastname: Hsu
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001724:Birth Weight; D015992:Body Mass Index; D001835:Body Weight; D015331:Cohort Studies; D005260:Female; D005317:Fetal Growth Retardation / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors; D013624:Taiwan / Q000453:epidemiology; D055815:Young Adult
keywords: Body mass index; Fetal growth restriction; Pregnancy; Risk factor; Small for gestational age